Lock or latch for windows.



' PATENTED MAR. 31 B. A. MARSH; f LOCK 0R LATGHPOR WINDOWS.

APPLICATION FILED FE'B. 20, 1907.

3 SHEETS-SHEET 2` u! il!! l! lmlpl I PATBNTED MAR. 31, 1908.

E. A MARSH. LoGKoR LATCH PoR WINDOWS.

APPLICATION FILED PER-20, 1907.

A l l. .nu rnrksc huzum an n c w A MJ@ PATENT OFFICE.

ERNEST A. MARSH, OF CHICAGO, ILLINOIS.

,LOCK on Lila-cn FOR WINDOWS.

.Specification of Letters Patent.

Patented March 31, 1908.

Application filed February 20, 1907. Serial No. 358,354.

T o all whom 'it may concern:

Be it known that I, vERNEST A. MARSH, a citizen of the United States, and residing at Chicago, in the county of Cook and State of Illinois, have invented a new vand useful Improvement in Locks or Latches for Windows, of which the following is a complete specilication.

rl`-'his invention relates to improvements in locks or latches for windows and the like, and more particularl to a gravity acting latch adapted to ut' ize the Weight of the window sash in forcing thesash against the sto to provide a tight joint.

-eretofore, especially in railway coaches,

, various devices have been resorted to for the 4purpose of insuring a tight joint between the window sash and the stop to prevent the admissionot d-ust and drafts ol? air and' also to prevent rattlin It has not however been possible hereto ore toutilize the weight of .the window' sash to produce this effect 'and it has usually been necessary to make a comparativel tightiit of both the jamb and the' sto to t e sash, thereby greatly interfering Wit the freedom of movement of the sash in opening or closing the window.

The object ofthis invention is to provide a Window lock or latch which acts under -the gravity of the sash to force the sash into close and binding contact with the Window stop, thereby providing a tight and noiseless bint.

J It is also an object of the invention to provide a cheap and simple device ada ted to be applied `to car windows inl particu ar and to press the sash firmly against the stop irrespective of whether the Window be in opened or closed position.

The invention consists of the matters -hereinafter described in the specification and more fully ointed out and defined thc ap ended c aims.' l n the drawings: Figure l is a fragmentary, inner elevation ofa car window provided With a lock embodying my invention. Fig.

2 is an end elevation o vthe lock. Fig. 3 is a rear side elevation of the lock. Fig. 4 is an enlarged, fragmentary section taken on line 4-4 of Fig. 1 and showing the -position which the sashassumes when being raised or lowered. FiO. 5 is a similar view, but showingl the sash 1n fully closed position. Fig, 6

,side ofthe catch rack arjacent the Basal;

yis .ai-fragmentary vertical section of the window 'Frame and showing in elevation Bue Fig. 7 is a still further enlarged, 'fragmentary section similar to that shown iny Fig.`4, but showing the position which the sash assumes with .respect to the window amb andz stop when the latch bolt is seating on the catch; Fig. 8 isa similar section showing the bolt fully seated, and Fig. 9 is an enlarged, frag'.- meiltary, perspective view of the catchrac As shown in said drawings: A indicates the Windowsash, which may be partially slide vertically between the jamb and the of said parts are of the ordinary or ofafny ypieerre construction and the jamb and- Said casing, as shown, is provided on its rear side, near the top thereof with a handle d2, and pivoted Within the casing is a bell crank lever da, one end of which extends through a suitable opening in the rear Wall of the casing beneath the handle d?, and the other end of which is provided with a laterally directed lug or pintle d4 which engages in a suitable aperture or recess in the rear end of the bolt D and acts to move the same. A guide shank d5 extends from the rear side oiE said bolt and is slidably engaged in the rear wall of the 'casing and a coiled spring d is carried thereon and one end engages said 'rear Wall 4and the other engages against the bolt and acts to normally hold the bolt extended from the Wall of the casing as shown in Fig. 3. Said bolt may be of any preferred shape in cross section, but as shown, it is approximately reotan ular and. the lower outer corner thereof, Or lt at furthest from the sash, is beveled i at an angle of approximately forty five degrees to the per endicular, and which pro-4 pose of which will be more l'ullyl-iereinafter window stop, indicated by B and B respectively, and When in closed position to sit onV the window stool C as shown in Fig. 5. AllA stop B and B are placed a sufficiently greater taching it to the sash, and a slidable bolt D..

x lained. Q=.-,i1)`ingaged at any suitable place but as counterbalanced if desired, and is adapted to i :iol

vides an incline( bearing face (Z7, the pur- Jfrom a point near the innier' face Oi'the bolt,

, when the window is in closed position and the sash in raising and lowering it tends to bolt en ages when the window is being raised shown to the inner edge of the jamb, or that adjacent the sash, is the catch or stop rack E, which, as shown, is countersunk in the jamb and is rovided at suitable distances throu h out its ength with catches or stops e and e', t e latter of -which affords a square shoulder on its under side beneath which the bolt engages prevents the window from being o ened until the bolt is withdrawn. Eaci o said catches or stops is provided with a downwardly and laterally inclined face e2 which is complemental with the inclined face of the bolt and on which the bolt rests when supporting the sash and which acts by reason of the attraction of gravity on the sash to throw the sash away from the jamb and againstthe stop as shown in Figs. 5, 7 and 8. The catches or stops e are each provided on their outer faces, or that adjacent the window opening, with an incline e3 against which the and which acts to retract the bolt.

The sashif referred maybe provided at its bottom and) sides with a weather strip F of rubber or other flexible material which acts to seal the 'oints and at the bottom affords a cushion for the sash and thus avoids nicety of -adjustment'between the bolt and the lower catch.

The operation is as follows: Inasmuch as the s ace between the j amb and the stop in whic the window travels is of somewhat greater width than the thickness of the sash 1t is obvious that the sash may have perfect freedom of movement. The force exerted on move it into contact with the j amb, as shown in Fi 4, and as soon as the lever d3 is release and the bolt is permitted to be forced outwardly by its sprmg onto the inclined face 2.0i the catch, gravity causes the sash to fall and said inclined face causes the bottom thereof to slide into contact with the stop B as shown in Fig. 7 ,'and inasmuch as the sash must seek its lowest level on the catch, the bolt moves still further down'the incline of said face until the top of the sash is forced firmly against the stop as shown in Figs. 5 and 8.

Obviously the lock may be countersunk in the edge of the sash if `desired and the catches may be set in the post G and may be made separately instead of in a continuous rack.

I claim as my invention:

1. In a device of the class described the combination with a sliding bolt, of a catch therefor having an inclined face adapted to retract the bolt and an inclined face at one side thereof upon which the bolt rests when seated.

2. In a device of the class described the combination with a sliding bolt adapted to be engaged to a window sash, of a catch therefor adapted to be supported adjacent the sash and having a bearing face for said bolt inclined from the to of the catch downwardly and laterally of t e longitudinal axis of the bolt and adapted to force the sash .laterally of the catch.

3. A window latch, comprising a casing adapted to be en aged to a window sash, a spring pressed bolt slidably engaged therein and having an inclined face on one side thereof extending from its bottom upwardly and lying in a plane parallel to the longitudinal axis of the bolt, and a catch adapted to be rigidly engaged to the window jamb and provided with a downwardly and laterally inclined face down which the inclined face of the bolt is adapted to slide in seating.

In testimony whereof I have hereunto subscribed my name in the presence of two witnesses.

ERNEST A. MARSH. 

